Thanks!
I had to redo my light box, since one of the LED light strips I was using died, and the tank was very dark and gloomy (which I think the fish loved). I added a pair of CFL screw in bulbs, but it was too bright, so I removed one of them. It seems to be dark enough for the fish to be happy, and light enough for me to see them and enjoy their colors. They've finally come out and been active in the tank. They're still feeding like pigs (2-3 feeder comets a day, each). The smaller one is rapidly catching up to the larger one in size, it seems like. I'll have to post some more pics in the next couple of days.